body {
    background: url(../img/bg.png);
}

.center {
    width: 540px;
    margin: 50px auto;
    background-color: rgba(245, 245, 245, 0.5);
}

#form {
    width: auto;
    height: auto;
}

.form_row {
    margin: 26px 60px;
    width: auto;
}

.form_row span {
    display: inline-block;
    width: 114px;
    text-align: right;
    color: cyan;
    font-weight: 600;
}

.form_row input[type=text],
.form_row input[type=number] {
    width: 240px;
    height: 1.7em;
    border-style: inset;
    border-radius: 4px;
    border-color: ivory;
    outline-color: #0D8DDC;
}

.form_row_right {
    float: right;
}

.is_out_div {
    display: inline;
    margin: 0 20px;
}

.is_out_div input[type=radio] {
    margin-right: 20px;
}

.is_out_div label {
    color: greenyellow;
}

#submit_btn {
    background: #0D8DDC;
    color: #fff;
    border: none;
    width: 80px;
    height: 30px;
}

.is_out_div input:checked {
    color: red;
    font-weight: bold;
    border: green;
}